Attic Insulation Question

chipster_2007October 6, 2012

In order to obtain the R value in my attic, I need to use two layers of the same material, mineral wool. Are there any problems with doing this? I have read so much about air flow, convection, etc that I want to be sure I am not overlooking anything? I will air seal the attic also at this time.

Thank you for reporting this comment. Undo
worthy

If the first layer of mineral wool comes to the top of the joists, put the second layer at a right angle so it covers the joists.

Don't skimp on safety precautions. I've found it a very irritating material to work with.

Much easier than using batts, try blown mineral wool (or cellulose).

    Bookmark   October 7, 2012 at 1:33PM
Thank you for reporting this comment. Undo
chipster_2007

Worthy, I have read warnings about using mineral wool but I was at home depot and pulled a bit of material out of an open bag (sml amt) , and my hands were fine. The material was soft and it didn't itch like fiberglass. What precautions should I be aware of besides the usual respirator/mask, eye and clothing protection. It appears to be benign compared to the fiberglass.

    Bookmark   October 8, 2012 at 1:02PM
Thank you for reporting this comment. Undo
chappy27

My house was built in 1947 and recently found out some old tile in my basement has asbestos. I panicked and looked at the insulation in my attic. It is brown loose and fluffy with blue & red soft flecks in it. With an educated guess, what do you think it may be? Cellulose, rock wool?

    Bookmark   October 9, 2012 at 3:24PM
Thank you for reporting this comment. Undo
worthy

What precautions should I be aware of besides the usual respirator/mask, eye and clothing protection[?]

That's it.

chappy27

Modern cellulose insulation wasn't used until the 1950s, so it's likely you have some sort of rockwool with mould growth or its residue. The mould lives on the dust in the wool, not the material itself.


Vermiculite insulation containing asbestos. Photo: Inspectapedia.

According to Inspectapedia, "Mineral wool insulation, slag wool insulation, and 'rock wool' insulation would not be expected to contain asbestos fibers - We have been unable to find reports indicating otherwise."

    Bookmark   October 10, 2012 at 1:00AM
Sign Up to comment
More Discussions
Hot water radiators
We own a 1900 home which has forced hot water heating...
alexia10
Original Heart of Pine Flooring - matching
Hello, I have a contract on a 1905 Edwardian row house....
lucy132
Adding a full bath to an old house.
Hello, first post in this forum. I am relocating and...
lucy132
Radon
Hi. I have never posted in this particular forum before,...
ilovemytrees
Yikes. I just bought an 1898 Victorian house
Hi, I have always loved old homes and had the opportunity...
adamsmile
Sponsored Products
Blindsgalore Cellular Shades: 3/8-inch Triple Cell
Blindsgalore
Orange Monster Lunch Box
$12.99 | zulily
Cheddar Cheese Straws
$24.00 | Horchow
Thurston Brushed Steel LED Ceiling Light
Lamps Plus
Otis Bed Luxury 8 in. Futon Mattress - 11LX9
$129.99 | Hayneedle
52" Kauai Corner Acrylic Tub
Signature Hardware
Tommy Bahama Beach Cart
$129.50 | FRONTGATE
Thermocast Kitchen Wentworth Drop-in Acrylic 25x22x9 0-Hole Single Bowl Kitchen
Home Depot
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™